3.Pressing Tor a number key at this time causes the x-value input dialog box to reappear so you can perform another estimated value calculation if you want.

•The pointer does not appear if the calculated coordinates are not within the display range.

•The coordinates do not appear if “Off” is specified for the “Coord” item of the Setup screen.

•The Y-CAL function can also be used with a graph drawn by using DefG feature.

SRegression Formula Copy Function from a Regression Calculation ResultScreen

In addition to the normal regression formula copy function that lets you copy the regression calculation result screen after drawing a statistical graph (such as Scatter Plot), the STAT mode also has a function that lets you copy the regression formula obtained as the result of a regression calculation. To copy a resulting regression formula, press (COPY).

IEstimated Value Calculation (, )

After drawing a regression graph with the STAT mode, you can use the RUN • MAT (or RUN) mode to calculate estimated values for the regression graph’s x and y parameters.

Example

To perform a linear regression using the nearby data and estimate the

 

values of ţ and [ů when xi = 20 and yi = 1000

 

 

 

 

 

 

 

 

 

 

 

 

xi

10

15

20

25

30

 

 

yi

1003

1005

1010

1011

1014

 

1.From the Main Menu, enter the STAT mode.

2.Input data into the list and draw the linear regression graph.

3.From the Main Menu, enter the RUN • MAT (or RUN) mode.

4.Press the keys as follows.

A?(value of xi)

*(STAT)*(ţ)U

*fx-7400GII: (STAT)

The estimated value ţ is displayed for xi = 20.

@???(value of yi)

(xˆ)U

The estimated value xˆ is displayed for yi = 1000.

•You cannot obtain estimated values for a Med-Med, quadratic regression, cubic regression, quartic regression, sinusoidal regression, or logistic regression graph.

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